Internal-combustion engine.



E. P. KRILL.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED SEPT-25.19%.

Patented Apr. 3, 1917.

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Specification of Letters Patent.

' Patented Apr. 3, 1217.

Application filed September 25, 1915. Serial No. 52,685. l

To all whom it may concern:

Be it known that I, EDWARD P. KRILL, a citizen of the United States,residing at St. Louis in the State of Missouri, have in-' vented certainnew and useful Improvements in Internal-Combustion Engines; and I dohereby declare the following to be a full, clear, and exactdescriptionof the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates tointernal combustion engines, and has for itsobject to provide a device designed to accelerate the motion of burntgases from the combustion chambers of the cylinders of an engine, and

thus materially increase the operating efliciency-of the engine.

Another object is the provision of a simple and practical means ofeffecting the expulsion of the burnt' products of combustion embodyinessentially a blower connected with the exhaust pipe of the engine,whereby a partial vacuum is maintained in the portion of the exhaustpipe adjacent the engine during operation of the latter.

With these and other objects in view, the invention consists in thenovel construction, arrangement and formation of parts as will behereinafter specifically described, claimed and illustrated in theaccompanying drawing, in which:

igure 1 represents a plan View of the invention embodied in the chassisof a motor vehicle,

Fig. 2 represents a detail side elevation of the fanblower, one of theside walls of the casin thereof being removed.

Re erring to the drawing in detail, wherein similar reference numeralsdesignate corviews, the numeral 5 indicates generally the chassis of amotor vehicle, which is supported at one end upon the rear or drivingaxle 6 rotatably received in the housin tube 21. An internal combustionengine 7 o the usual or any preferred type is mounted in the forwardportion of the chassis 5 and is provided with the usual exhaust pipe 8extending rearwardly of the chassis 5 and being connected at its rearend with a mufiier 9.

Acasing 9 is sup orted in the chassis 5 and is provided wit the usualinlet and exhaust pipes 10 and 11, respectively. At a point intermediatethe engine 7 and the muflier 9, a section of the exhaust pipe e iscutout and the forward portion thereof is connected with the inlet pipe10, and the rear portion thereof. is. connected with the outlet pipe 11.A- shaft 12 is rotatably mounted in the casing 9 and is provided with asuitable type of rotor 13, adapted, When rotated, to cause a draft ofair to flow from the inlet through the outlet pipe 11.

A rotor shaft 12'is rotatably supported in the casing 5 and is extendeda distance laterally of the casing 9 and is provided with a bevelgear-wheel 14, which meshes with a bevel gear wheel 15 non-rotatablysecured to a counter-shaft 16'disposed longitudinally of the casing 5and providedat its rearend with a bevel gear wheel 17, which latter isare rotatably supported in a bearing mefi'r ber 20 attached to thechassis 5 and a part 4 of the housing tube 21 is enlarged, as indicatedat 22, to provide a protective housing for the bevel gear wheels 17 and18.

During operation of the engine, rotary motion is transmitted to therotor 13 through the bevel gear wheels 18 and 17, counter shaft 16,bevel gear wheels 15 and 14 and the shaft 12. The rotary motion of theshaft 12 and rotor 13 creates a suction in the forward portion of theexhaust pipe 8 and thus when the exhaust valves of the en glue 7 areopenedthe products of combustion in the explosion'chambers are quicklyand thoroughly exhausted from the cylinders. The products of combustionin the explosion chambers are quickly and thoroughly exhausted fromthecylinders. The products of combustion are exhausted from the easing 9?through the outlet pipe 11 and the rear extremity of the exhaust pipe8:1

By connecting the rotor 13 with the rear axle 6, instead. of with thecrank or drive shaft of the engine, it is evident that when the vehicleis stationary and the en ine is running idle the rotor 13 will remamstationary and the blades thereof will act as bafiie plates to decreasethe noise which accomplishes the discharge of the exhaust products ofcombustion from the engine. It is further evident that by so arrangingthe driving connections between the rotor and the engine, the speed ofthe rotor is governed by the speed of the vehicle and not by the speedof the engine. I

. I s further evident that when the vehicle is running in low gear, aswhen starting or climbing steep grades, the rear axle 6 rotates at aconsiderably lower speed than the engine shaft and thus the rotor 13,which is directly connected with the rear axle, rotating at acomparatively low speed will retard the passage of the products ofcombustion through the exhaust pi e 8 and thus further decrease thenoise w ich accompanies the discharge of the exhaust products ofcombustion. 7

What I claim is:

1. The combination with a motor vehicle including an internal combustionengine, a rear axle connected therewith, an exhaust ipe connected withthe engine, and a muf- Eer connected with said exhaust pipe, of a casinglhaving inlet and outlet ports connected with the exhaust pipeintermediate the engine and muflier, a rotor mounted in the casingadapted during operation to force the products of combustion from theengine through the muflier, and driving connections between the rearaxle and said rotor for operating the latter only during travel of thevehicle.

2. The combination with a motor vehicle including a chassis, an'internal combustion engine supported upon the chassis, a rear axleconnected with the engine, a housing tube receiving said rear axle, andan exhaust pipe connected with the engine, of a casing having inlet andoutlet ports, a shaft rotatably mounted in said casing and extending.exteriorlythereof, a rotor arranged in said casing and supported uponsaid shaft, a bearing member secured to said chassis supporting one endof said shaft, a countershaft rotatably supported in one end of saidbearing member andsupported at its opposite end in said housin tube,bevel gear wheels connecting the ad acent terminals of the first andsecond-mentioned shafts, the inlet and outlet ports of the casing beingconnected with said exhaust pipe, and bevel gear wheels connecting therear axle with the second-mentioned shaft and being housed within theaxle tube.

In testimony whereof I afiix my signature in presence of two witnesses.

- EDWARD P. KRILL. Witnesses:

GEO. C. HUBERD, HENRY C. Gnnnns.

